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Gradient porosity microstructure based on conch bionics

A gradient pore and gradient structure technology, which is applied to vehicle parts, transportation and packaging, chemical instruments and methods, etc., can solve problems that are not involved, improve the performance of sound absorption and insulation, improve the overall sound absorption and insulation performance, and improve the durability Collision effect

Active Publication Date: 2022-07-26
JILIN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The design of the front wall of the car in the above patents does not involve the design of the material structure, considering the sound absorption performance of the passenger compartment to improve the overall sound absorption and insulation performance of the inner front wall

Method used

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  • Gradient porosity microstructure based on conch bionics
  • Gradient porosity microstructure based on conch bionics
  • Gradient porosity microstructure based on conch bionics

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specific Embodiment

[0025] At present, the acoustic package structure of the front wall of the automobile is mainly divided into three layers: the hard layer porous material, the impermeable layer and the soft layer porous material. Both the hard layer porous material and the soft layer porous material of the front and rear porous material layers are a single-layer material, that is, a single-porosity structure. The pore structure of a single-layer material is single, and its sound absorption coefficient-frequency curve has peaks and troughs, so a single-layer material with a single property has a larger sound absorption coefficient at the peak frequency in a wider frequency domain, and other frequencies The sound absorption coefficient is smaller .

[0026] attached by figure 1 Shown: the hard-layer porous material and the soft-layer porous material of the automobile inner front wall structure of the present invention both adopt a gradient porosity structure in which a plurality of single-layer...

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Abstract

The invention relates to a conch bionic-based gradient porosity micro-structured automobile inner front wall acoustic package structure, comprising a hard-layer porous material layer, a micro-structure material layer, an impermeable layer, a micro-structure material layer and a soft-layer porous material layer. The layer porous material layer and the soft layer porous material layer are material layers with a porosity gradient structure. The anti-seepage layer adopts the conch bionic resonance sound absorption structure. II, the conch bionic structural part II is provided with a plurality of cavity openings arranged evenly, and the cavity openings are provided with a plurality of hollow chambers arranged in a spiral progressive order, and the hollow chambers pass through each cavity The chamber communication pipe extending from the chamber is connected, and the inner surface of the hollow chamber is covered with a sound-absorbing material layer; a layer of microstructure material is respectively added between the hard layer porous material layer and the impermeable layer, and the soft layer porous material layer and the impermeable layer. layer, the microstructure material layer adopts a negative Poisson's ratio concave triangular structure. The invention effectively improves the sound absorption and insulation performance, and can improve the crash resistance of the front wall when the front cabin of the automobile collides.

Description

technical field [0001] The invention relates to the field of automobile noise reduction, in particular to a conch bionic-based gradient porosity microstructure automobile inner front wall acoustic package structure. Background technique [0002] Nowadays, the car has become one of the most important means of transportation in everyone's life, and people have gradually put forward higher requirements for the sound quality of the car. The car engine is one of the main sources of car noise. The car dash panel is the main auto part that blocks the transmission of the engine compartment noise to the passenger compartment. The car inner dash is the most important acoustic package in the whole vehicle with the largest sound absorption and sound insulation capacity. one. [0003] At present, the Chinese Patent Publication No. CN 106113841 A discloses a sound-insulating automobile front wall. Considering the aspects of sound insulation and foam bonding, an automobile front wall with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R13/08B32B3/24B32B27/36B32B27/30B32B27/40B32B33/00
CPCB60R13/0815B32B3/266B32B27/36B32B27/306B32B27/40B32B33/00B32B2307/102B32B2307/10
Inventor 陈鑫马文婷梁鸿宇马浩明马芳武
Owner JILIN UNIV
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